Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ecad7e80d2c88a…

MALICIOUS

PDF

54.7 KB Created: 2020-08-10 06:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 787b98e45b95995cd63fe600a530768c SHA-1: 0953bbafc2f009204a0efa394f0d53fc82cabd15 SHA-256: 75ecad7e80d2c88a9793a6ffd67d40e68c2119d41c990411544c51d950f76659
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a link farm designed for SEO manipulation. One of the primary links, https://ttraff.cc/pify?keyword=alimentacion+complementaria+a+partir+de+los+4+meses+pdf, is identified as a malicious redirector. The document's structure and the presence of these links suggest an attempt to drive traffic to malicious or spam-related websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=alimentacion+complementaria+a+partir+de+los+4+meses+pdf
    • http://files.mvhope.org/uploads/1/3/0/8/130874296/kuwaron_kopisizato_paririwufujino_tikijasiva.pdf
    • http://files.diycottage4u.com/uploads/1/3/1/6/131637273/93c34.pdf
    • http://files.kpsm.net/uploads/1/3/1/4/131411596/tigafoni_lumipelukuvij_fejila.pdf
    • http://files.bluelotusmehndi.com/uploads/1/3/0/8/130813134/1530276.pdf
    • http://files.thetorrancecarpetcleaners.com/uploads/1/3/0/8/130813888/luginu-juzuv-matitonitozubof.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/calculus_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/converter_to_word_online_terbaik.pdf
    • https://cdn.shopify.com/s/files/1/0435/8301/3023/files/art_a_brief_history_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0429/7578/9215/files/59714508071.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/riweb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8239/1451/files/zadedav.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/cancionero_de_guitarra_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0430/6301/7629/files/71319644818.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/piviwalesojeganej.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/dowebotuwibekapojosaziful.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/27327950599.pdf
    • https://cdn.shopify.com/s/files/1/0430/0885/2117/files/govemogifamezeweraxukuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000925d.bin
b5b51827ec7a1a09cdb08ee00558ba0705d44cb8b0405b44eef540fa87376089		 pdf-font-stream PDF embedded font (sfnt) at offset 0x925D 5380 bytes
font_01_sfnt_off0000a494.bin
97201c4e6516ec47f60e050167ebc5d7c1aab47d39389d874298b1fee9807685		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA494 12036 bytes

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